Large aperture super wide angle lens

Claim 2

A super wide angle lens comprising 13 lenses grouped in 11 components wherein the first and second lenses are negative meniscus lenses convex to the object, the third lens is a positive lens, the fourth lens is a negative meniscus lens convex to the object, the fifth, sixth and seventh lenses constitute a cemented triplet, the eighth lens is a negative meniscus lens convex to the object, the ninth lens is a positive lens, the tenth lens is a thick positive lens, the eleventh lens is a negative lens, and the twelfth and thirteenth lenses are positive lenses convex to the image, and further comprising a filter located between said eighth and ninth lenses, wherein the radii r 1 to r 24 , the thickness and separations d 1 to d 23 , the refractive indices n 1 to n 13 , and Abbe numbers ν 1 to ν 13 of said first to thirteen lenses L 1 to L 13 , respectively, satisfy the following conditions: Radius of Lens Thick- Refractive Abbe ness or Lens Curvature r or Distance d Index n No. ν ______________________________________ r.sub.1 = 256.3 L.sub.1 d.sub.1 = 6.5 n.sub.1 = 1.6031 ν.sub.1 = 60.7 r.sub.2 = 121.6 d.sub.2 = 47.4 r.sub.3 = 253.9 L.sub.2 d.sub.3 = 14.1 n.sub.2 = 1.7410 ν.sub.2 = 52.7 r.sub.4 = 125.8 d.sub.4 = 57.4 r.sub.5 = 783.8 L.sub.3 d.sub.5 = 22.9 n.sub.3 = 1.6258 ν.sub.3 = 35.7 r.sub.6 =-430.9 d.sub.6 = 6.1 r.sub.7 = 211.3 L.sub.4 d.sub.7 = 9.3 n.sub.4 = 1.8160 ν.sub.4 = 46.8 r.sub.8 = 119.7 d.sub.8 = 16.4 r.sub.9 = 277.8 L.sub.5 d.sub.9 = 8.1 n.sub.5 = 1.5473 ν.sub.5 = 53.6 r.sub.10 = 119.3 L.sub.6 d.sub.10 = 43.2 n.sub.6 = 1.7200 ν.sub.6 = 50.3 r.sub.11 =-100.4 L.sub.7 d.sub.11 = 12.6 n.sub.7 = 1.5613 ν.sub.7 = 45.2 r.sub.12 = 5113.5 d.sub.12 = 0.5 r.sub.13 = 89.6 L.sub.8 d.sub.13 = 8.1 n.sub.8 = 1.6968 ν.sub.8 = 56.5 r.sub.14 = 47.6 d.sub.14 = 20.5 r.sub.15 = 455.8 filter thickness 4.3 L.sub.9 d.sub.15 = 10.3 n.sub.9 = 1.8051 ν.sub.9 = 25.4 r.sub.16 =-249.8 d.sub.16 = 9.9 r.sub.17 =-834.6 L.sub.10 d.sub.17 = 57.2 n.sub.10 = 1.4645 ν.sub.10 = 66.0 r.sub.18 =-66.9 d.sub.18 = 0.5 r.sub.19 =-201.9 L.sub.11 d.sub.19 = 5.4 n.sub.11 = 1.8051 ν.sub.11 = 25.4 r.sub.20 = 157.9 d.sub.20 = 11.1 r.sub.21 =-1167.6 L.sub.12 d.sub.21 = 25.5 n.sub.12 = 1.4645 ν.sub.12 = 66.0 r.sub.22 =-95.6 d.sub.22 = 0.5 r.sub.23 = 10629.3 L.sub.13 d.sub.23 = 18.9 n.sub.13 = 1.6204 ν.sub.13 = 60.3 r.sub.24 =-209.0 ______________________________________

Claim 3

A super wide angle lens comprising thirteen lenses grouped in eleven components wherein the first and second lenses are negative meniscus lenses convex to the object, the third lens is a positive lens, the fourth lens is a negative meniscus lens convex to the object, the fifth, sixth and seventh lenses constitute a cemented triplet, the eighth lens is a negative meniscus lens convex to the object, the ninth lens is a positive lens, the tenth lens is a thick positive lens, the eleventh lens is a negative lens, and the twelfth and thirteenth lenses are positive lenses convex to the image, and further comprising a filter located between said eighth and ninth lenses, wherein the radii r 1 to r 24 , the thicknesses and separations d 1 to d 23 , the refractive indices n 1 to n 13 , and Abbe numbers ν 1 to ν 13 of said first to thirteenth lenses L 1 to L 13 , respectively, satisfy the following conditions: Radius of Curva- Lens Thickness Refractive Abbe Lens ture r or Distance d Index n No. ν __________________________________________________________________________ r.sub.1 = 234.4 L.sub.1 d.sub.1 = 6.5 n.sub.1 = 1.6031 ν.sub.1 = 60.7 r.sub.2 = 115.9 d.sub.2 = 48.9 r.sub.3 = 281.5 L.sub.2 d.sub.3 = 14.1 n.sub.2 = 1.7340 ν.sub.2 = 51.51- r.sub.4 = 121.9 d.sub.4 = 56.5 r.sub.5 = 600.7 L.sub.3 d.sub.5 = 27.6 n.sub.3 = 1.6200 ν.sub.3 = 36.3 r.sub.6 =-416.3 d.sub.6 = 7.1 r.sub.7 = 205.1 L.sub.4 d.sub.7 = 9.3 n.sub.4 = 1.7995 ν.sub.4 = 42.2 r.sub.8 = 129.4 d.sub.8 = 14.5 r.sub.9 = 280.4 L.sub.5 d.sub.9 = 8.1 n.sub.5 = 1.5523 ν.sub.5 = 63.7 r.sub.10 = 111.9 L.sub.6 d.sub.10 = 42.1 n.sub.6 = 1.7200 ν.sub.6 = 50.3 r.sub.11 =-101.4 Lhd 7 d.sub.11 = 12.6 n.sub.7 = 1.5613 ν.sub.7 = 45.2 r.sub.12 =-13184.4 d.sub.12 = 0.5 r.sub.13 = 102.0 L.sub.8 d.sub.13 = 6.4 n.sub.8 = 1.7200 ν.sub.8 = 50.3 r.sub.14 = 47.5 d.sub.14 = 16.9 r.sub.15 = 485.3 filter thickness 4.3 L.sub.9 d.sub.15 = 11.7 n.sub.9 = 1.8051 ν.sub.9 = 25.4 r.sub.16 =-264.1 d.sub. 16 = 9.9 r.sub.17 =-5686.1 L.sub.10 d.sub.17 = 62.1 n.sub.10 = 1.4645 ν.sub.10 = 66.0 r.sub.18 =-66.7 d.sub.18 = 0.5 r.sub.19 =-273.7 L.sub.11 d.sub.19 = 6.5 n.sub.11 = 1.8051 ν.sub.11 = 25.4 r.sub.20 = 151.0 d.sub.20 = 14.6 r.sub.21 =-725.0 L.sub.12 d.sub.21 = 23.4 n.sub.12 = 1.4645 ν.sub.12 = 66.0 r.sub.22 =-100.0 d.sub.22 = 0.5 r.sub.23 =-3616.9 L.sub.13 d.sub.23 = 18.7 n.sub.13 = 1.6204 ν.sub.13 = 60.3 r.sub.24 =-200.9. __________________________________________________________________________

Claim 4

A super wide angle lens comprising thirteen lenses grouped in eleven components wherein the first and second lenses are negative meniscus lenses convex to the object, the third lens is a positive lens, the fourth lens is a negative meniscus lens convex to the object, the fifth, sixth and seventh lenses constitute a cemented triplet, the eighth lens is a negative meniscus lens convex to the object, the ninth lens is a positive lens, the tenth lens is a thick positive lens, the eleventh lens is a negative lens, and the twelfth and thirteenth lenses are positive lenses convex to the image, and further comprising a filter located between said eighth and ninth lenses, wherein the radii r 1 to r 24 , the thicknesses and separations d 1 to d 23 , the refractive indices n 1 to n 13 , and Abbe numbers ν 1 to ν 13 of said first to thirteenth lenses L 1 to L 13 , respectively, satisfy the following conditions: Radius of Curva- Lens Thickness Refractive Abbe Lens ture r or Distance d Index n No. ν __________________________________________________________________________ r.sub.1 = 234.4 L.sub.1 d.sub.1 = 6.5 n.sub.1 = 1.6031 ν.sub.1 = 60.7 r.sub.2 = 115.9 d.sub.2 = 48.9 r.sub.3 = 281.5 L.sub.2 d.sub.3 = 14.1 n.sub.2 = 1.7340 ν.sub.2 = 51.51- r.sub.4 = 121.9 d.sub.4 = 56.5 r.sub.5 = 600.7 L.sub.3 d.sub.5 = 27.6 n.sub.3 = 1.6200 ν.sub.3 = 36.3 r.sub.6 =-416.3 d.sub.6 = 7.1 r.sub.7 = 205.1 L.sub.4 d.sub.7 = 9.3 n.sub.4 = 1.7995 ν.sub.4 = 42.2 r.sub.8 = 129.4 d.sub.8 = 14.5 r.sub.9 = 280.4 L.sub.5 d.sub.9 = 8.1 n.sub.5 = 1.5523 ν.sub.5 = 63.7 r.sub.10 = 111.9 L.sub.6 d.sub.10 = 42.1 n.sub.6 = 1.7200 ν.sub.6 = 50.3 r.sub.11 =-101.4 Lhd 7 d.sub.11 = 12.6 n.sub.7 = 1.5613 ν.sub.7 = 45.2 r.sub.12 =-13184.4 d.sub.12 = 0.5 r.sub.13 = 102.0 L.sub.8 d.sub.13 = 6.4 n.sub.8 = 1.7200 ν.sub.8 = 50.3 r.sub.14 = 47.5 d.sub.14 = 16.9 r.sub.15 = 485.3 filter thickness 4.3 L.sub.9 d.sub.15 = 11.7 n.sub.9 = 1.8051 ν.sub.9 = 25.4 r.sub.16 =-264.1 d.sub. 16 = 9.9 r.sub.17 =-5686.1 L.sub.10 d.sub.17 = 62.1 n.sub.10 = 1.4645 ν.sub.10 = 66.0 r.sub.18 =-66.7 d.sub.18 = 0.5 r.sub.19 =-273.7 L.sub.11 d.sub.19 = 6.5 n.sub.11 = 1.8051 ν.sub.11 = 25.4 r.sub.20 = 151.0 d.sub.20 = 14.6 r.sub.21 =-725.0 L.sub.12 d.sub.21 = 23.4 n.sub.12 = 1.4645 ν.sub.12 = 66.0 r.sub.22 =-100.0 d.sub.22 = 0.5 r.sub.23 =-3616.9 L.sub.13 d.sub.23 = 18.7 n.sub.13 = 1.6204 ν.sub.13 = 60.3 r.sub.24 =-200.9. __________________________________________________________________________